By fuel injector cleaner I presume you mean some sort of fuel additive, don't waste your money. There are many comnpies out there that will clean them for you or you can DIY (search YouTube for something along the lines of "how to clean injectors" it involves using a can of carb cleaner making up a little 12V rig to "open" the injector and spray the carb cleaner through it (not the best description, have a look on YouTube).